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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
3*x-((2/2)*x)-1 = x+10/x+7 // - x+10/x+7
3*x-((2/2)*x)-x-(10/x)-7-1 = 0
3*x-x-x-10*x^-1-7-1 = 0
1*x^1-10*x^-1-8*x^0 = 0
(1*x^2-8*x^1-10*x^0)/(x^1) = 0 // * x^2
x^1*(1*x^2-8*x^1-10*x^0) = 0
x^1
x^2-8*x-10 = 0
x^2-8*x-10 = 0
DELTA = (-8)^2-(-10*1*4)
DELTA = 104
DELTA > 0
x = (104^(1/2)+8)/(1*2) or x = (8-104^(1/2))/(1*2)
x = (2*26^(1/2)+8)/2 or x = (8-2*26^(1/2))/2
x in { (8-2*26^(1/2))/2, (2*26^(1/2)+8)/2}
x in { (8-2*26^(1/2))/2, (2*26^(1/2)+8)/2 }
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